One can find more information about retail merchandising from the following sources: Retail Merchandiser, Wikipedia, Prospects, Wise Geek, Retail Industry, SAS Retail, NARMS, Oracle, National Careers Service.
This is one of the questions on the Secret Shopper merchandising certification, the answer is modular (i.e. modular is not an example of POP).
Merchandising conglomerates can be defined as a combination of several diversified retailing lines and forms under central ownership, as well as integrate distribution and management of functions. Merchandising conglomerates are relatively free-form
Because visual merchandising utilizes things that can be seen to promote sales, and a display is a thing that can be seen.